Cooling Operation; Cooling Capacity Control; Limit Of Maximum Frequency Based On Outdoor Temperature - Fujitsu ASTG18KMTC Service Instruction

1. COOLING OPERATION

1-1 COOLING CAPACITY CONTROL

A sensor (room temperature thermistor) built in the indoor unit body will usually perceive
difference or variation between a set temperature and present room temperature, and
controls the operation frequency of the compressor.
* If the room temperature is 6°C higher than a set temperature, the compressor operation
frequency will attain to maximum performance.
* If the room temperature is 1°C lower than a set temperature, the compressor will be
stopped.
* When the room temperature is between +6°C to -1°C of the setting temperature,
the compressor frequency is controlled within the range shown in Table1.
However, the maximum frequency is limited in the range shown in Figure1 based on the
fan speed mode and the outdoor temperature.
( Table1 : Compressor Frequency Range )
AOTG18KMTC
AOTG22KMTC
AOTG24KMTC
( Fig.1 : Limit of Maximum Frequency based on Outdoor Temperature )
Outside air
temperature drops
A zone
34°C
B zone
30°C
C zone
19°C
D zone
10°C
E zone
0°C
F zone
minimum maximum
frequency frequency
10rps 74rps
10rps 94rps
10rps 111rps
Outside air
temperature rises
36°C
32°C
21°C
12°C
2°C
A zone
18KMTC
B zone
C zone
D zone
E zone
F zone
A zone
22KMTC
B zone
C zone
D zone
E zone
F zone
A zone
24KMTC
B zone
C zone
D zone
E zone
F zone
01-01
Hi Me Lo
74rps 46rps 34rps
74rps 46rps 34rps
74rps 46rps 34rps
50rps 39rps 30rps
50rps 39rps 30rps
50rps 39rps 30rps
94rps 46rps 34rps
94rps 46rps 34rps
94rps 46rps 34rps
50rps
39rps 30rps
50rps 39rps 30rps
50rps 39rps 30rps
111rps 46rps 34rps
111rps
46rps 34rps
111rps 46rps 34rps
50rps 39rps 30rps
50rps 39rps 30rps
50rps 39rps 30rps
Quiet
24rps
24rps
24rps
24rps
24rps
24rps
24rps
24rps
24rps
24rps
24rps
24rps
24rps
24rps
24rps
24rps
24rps
24rps